#define MAXOP   100  /* max size of operand or operator */
#define NUMBER  '0'  /* signal that a number was found */
#define PEEK    '1'  /* signal that a peek command was found */
#define SWAP    '2'  /* signal that a swap command was found */
#define CLEAR   '3'  /* signal to clear the value stack */
#define DUPE    '4'  /* signal to duplicate the top of the stack */
#define SINE    '5'  /* signal that a sin command was found */
#define EXP     '6'  /* signal that a exp command was found */
#define POW     '7'  /* signal that a pow command was found */
#define SET     '8'  /* signal that a variable set command was found */
#define GET     '9'  /* signal that a variable get command was found */
#define STRNG     'A'  /* signal that a variable get command was found */

